Foods start loosing their appearance and nutritive value within 2-3 days, when kept at room temperature, are called :

Question

Accepted Answer

Foods that start losing their appearance and nutritive value within 2-3 days when kept at room temperature are classified as "perishable foods." This classification is based on the inherent characteristics of these foods, which include high moisture content and a natural tendency to spoil quickly due to microbial growth, enzymatic reactions, and chemical changes. Common examples of perishable foods include fresh fruits, vegetables, dairy products, and meats. These foods require proper storage conditions, such as refrigeration, to extend their shelf life and maintain their quality.

Now, let's examine why the other options are incorrect:

1. **Non-perishable foods**: These foods have a long shelf life and do not spoil quickly, even when stored at room temperature. They typically include items like canned goods, dried grains, and pasta. The low moisture content and packaging methods used for non-perishable foods help prevent spoilage, making them unsuitable for the description provided in the question.

2. **Semi-perishable foods**: These foods have a moderate shelf life and can last longer than perishable foods but will eventually spoil if not stored properly. Examples include certain baked goods, nuts, and some cheeses. While they do spoil over time, they do not lose their appearance and nutritive value as quickly as perishable foods do within 2-3 days at room temperature.

3. **Convenient foods**: This category refers to foods that are easy to prepare and consume, often requiring minimal cooking or preparation time. Convenience foods can be perishable, semi-perishable, or non-perishable, depending on their specific characteristics. Therefore, this category does not specifically address the spoilage rate or shelf life of foods.

In conclusion, perishable foods are the correct classification for foods that lose their appearance and nutritive value within 2-3 days at room temperature, as they are highly susceptible to spoilage due to their natural properties.